WO2023157886A1

WO2023157886A1 - Lamp

Info

Publication number: WO2023157886A1
Application number: PCT/JP2023/005292
Authority: WO
Inventors: 裕司櫻井; 貴丈戸塚; 祐貴高橋
Original assignee: 株式会社小糸製作所
Priority date: 2022-02-18
Filing date: 2023-02-15
Publication date: 2023-08-24

Abstract

A vehicle lamp (1) comprises a light source (6) provided in a lamp chamber (5), a leveling mechanism (200) that adjusts the exit direction of the light of the light source (6), a partition wall (8) that forms a humidity-adjustment chamber (9), and a humidity-adjustment mechanism (100). The partition wall (8) has an inner opening portion (11). A housing (3) has an outer opening portion (10). The humidity-adjustment mechanism (100) includes a hygroscopic member (110), a moving mechanism (130) that moves the hygroscopic member (110) to a first position and a second position, and a transmission mechanism (300).

Description

lamp

This disclosure relates to lamp fixtures.

In the mechanism described in Patent Document 1, after the humidity in the lamp chamber is absorbed by the moisture absorbing material, the lamp chamber and the moisture absorbing chamber are separated by a partition, and the moisture absorbing material is heated while the moisture absorbing chamber is open to the outside of the lamp chamber. , proposed a dehumidification mechanism that releases moisture to the outside.

U.S. Patent Application Publication No. 2019/0299152

By the way, in the dehumidification mechanism described in Patent Document 1, it is necessary to install a power source such as a motor in order to move the moisture absorbing material, which tends to increase the size of the vehicle lamp.

An object of the present disclosure is to provide a vehicle lamp having a dehumidification mechanism that is suppressed in size.

A lamp according to an aspect of the present disclosure includes
a light source provided in a lamp chamber formed by an outer lens and a housing;
a leveling mechanism for adjusting the direction of light emitted from the light source,
a partition partitioning a part of the lamp chamber to form a humidity control chamber;
and a humidity control mechanism,
The partition wall is provided with an inner opening that connects the lamp chamber and the humidity control chamber,
The housing is provided with an outer opening that communicates the humidity control chamber with the outside,
The humidity control mechanism is
a moisture absorbing member movably provided in the humidity control chamber;
a movement mechanism for moving the moisture absorbing member between a first position for closing the outer opening and a second position for closing the inner opening;
It has a transmission mechanism that transmits power from the leveling mechanism to the moving mechanism.

According to the vehicle lamp of the present disclosure, since the power of the leveling mechanism mounted on the vehicle lamp can be transmitted to the moving mechanism in the humidity control mechanism, a new power source can be used to move the moisture absorbing member. need not be set. Therefore, even if the humidity control mechanism is mounted, the size of the vehicular lamp is suppressed.

FIG. 1 is a schematic diagram showing an example of a lamp according to the present disclosure. FIG. 2 shows an example of a humidity control mechanism and a leveling mechanism according to the embodiment. FIG. 3 shows an example of a humidity control mechanism and a leveling mechanism according to the embodiment. FIG. 4 is an example of a humidity control mechanism and a leveling mechanism according to the embodiment. FIG. 5 is an example of a humidity control mechanism and a leveling mechanism according to the embodiment. FIG. 6 is an example of a humidity control mechanism and a leveling mechanism according to the embodiment.

FIG. 1 is a schematic diagram showing an example of a vehicle lamp 1 according to an embodiment of the present disclosure.

Hereinafter, in describing the vehicle lamp 1 according to the present embodiment, the direction in which light is emitted from the light source 6 is the front direction, the opposite direction is the rear direction, the upward direction in FIG. 1 is the upward direction, and the downward direction is the downward direction. defined as

In this embodiment, a vehicle lamp 1 mounted on a vehicle will be described as a lamp. As shown in FIG. 1 , the vehicle lamp 1 has an outer lens 2 , a housing 3 , a light source unit 4 , a humidity control mechanism 100 , a leveling mechanism 200 and a transmission mechanism 300 . A lamp chamber 5 is composed of the outer lens 2 and the housing 3 . A light source unit 4 is provided inside the lamp chamber 5 , and the light source unit 4 has a light source 6 and an inner lens 7 . A part of the lamp chamber 5 is partitioned by a partition wall 8 as a humidity control chamber 9 , and a humidity control mechanism 100 is provided inside the humidity control chamber 9 .

The light emitted from the light source 6 is emitted to the front of the lamp via the inner lens 7 and the outer lens 2 . When the humidity inside the lamp chamber 5 increases, dew condensation may occur on the inner wall of the outer lens 2 . Then, it becomes difficult to irradiate the desired place with the light emitted from the light source 6 with the desired intensity. Therefore, the present disclosure includes a humidity control mechanism 100 capable of adjusting the humidity inside the lamp chamber 5 .

The vehicle lamp 1 is equipped with a leveling mechanism 200 for adjusting the emission direction of light emitted from the light source 6 . The leveling mechanism 200 adjusts the emission direction of the light emitted from the light source 6 by vertically tilting the fixing plate 12 to which the light source unit 4 is fixed. The leveling mechanism 200 has an actuator 220 such as an electric motor. In the present disclosure, a transmission mechanism 300 that transmits power of the leveling mechanism 200 to the humidity control mechanism 100 is provided between the leveling mechanism 200 and the humidity control mechanism 100 .

The leveling mechanism 200 has a body portion 210 , an actuator 220 , a motor 230 , a latch mechanism 240 and a switching mechanism 250 .
The body portion 210 is provided behind the light source unit 4 and is a member that houses an actuator 220, a motor 230, a latch mechanism 240, and a switching mechanism 250, which will be described later.
The actuator 220 is a member connected to the light source unit 4 and the motor 230 and configured to be movable in the front-rear direction. By moving the actuator 220 in the front-rear direction, the emission direction of the light source 6 of the light source unit 4 can be adjusted.
A motor 230 is connected to and powers the actuator 220 .

The latch mechanism 240 is provided on the actuator 220, and can engage the transmission mechanism 300 and the actuator 220, which will be described later. Hereinafter, a state in which the latch mechanism 240 engages the transmission mechanism 300 and the actuator 220 is referred to as a transmission state, and a state in which the transmission mechanism 300 and the actuator 220 are not engaged is referred to as a non-transmission state.
A switching mechanism 250 is provided in the main body 210 and is a member capable of switching between the above-described transmission state and non-transmission state.

The transmission mechanism 300 is a rod-shaped member connected to the movement mechanism 130. As described above, the transmission mechanism 300 is configured to be engageable with the latch mechanism 240 . When the transmission mechanism 300 is in the transmission state, it can move together with the actuator 220 and move the movement mechanism 130 connected to the transmission mechanism 300 . Latching mechanism 240 may be engageable with transmission mechanism 300 by leaf springs, disc springs, or other engagement methods.

The housing 3 has an outer opening 10 that communicates the humidity control chamber 9 with the outside. The outer opening 10 is an opening provided in the housing 3 . A humidity control mechanism 100 is provided in the housing 3 so as to block the outer opening 10 .

The partition wall 8 has an inner opening 11 that connects the lamp chamber 5 and the humidity control chamber 9 . The inner opening 11 is an opening provided in the partition wall 8 .

In this embodiment, a plurality of outer openings 10 and inner openings 11 are provided. If possible, one or more may be provided.

Next, the humidity control mechanism 100 will be described. As shown in FIG. 1 , the humidity control mechanism 100 has a moisture absorbing member 110 , a heater 120 , a moving mechanism 130 , a case 150 and a holding mechanism 160 .
Moisture absorbing member 110 is a member capable of absorbing moisture in the air. Also, the moisture absorbing member 110 is a member that releases absorbed moisture into the air when heated to a high temperature. For example, the hygroscopic member 110 can be made of silica gel, zeolite, polymer hygroscopic material, or the like that releases moisture at about 150 degrees. Moisture absorbing member 110 is preferably a sheet-like or plate-like member.

The moving mechanism 130 moves the moisture absorbing member 110 between a first position that closes the outer opening 10 and a second position that closes the inner opening 11 . The moving mechanism 130 is provided inside the humidity control chamber 9 as shown in the drawing, and has a parallel link 131 and an elastic portion 139 .

The parallel link 131 has an elongated first link 132 and an elongated second link 133 . The first link 132 and the second link 133 are provided parallel to each other.
One end of the first link 132 is rotatably and immovably fixed by a first joint portion 134 . The first link 132 is rotatable around the first joint portion 134 . A second joint portion 135 is provided on the other side of the first link 132 . A moisture absorbing member 110 is attached to the other end of the first link 132 .
One end of the second link 133 is rotatably and immovably fixed by a third joint portion 136 . One end of the first link 132 and one end of the second link 133 are located on the same side. The second link 133 is rotatable around the third joint portion 136 . A fourth joint portion 137 is provided at the other end of the second link 133 .

The first joint portion 134, the second joint portion 135, the third joint portion 136, and the fourth joint portion 137 form a parallelogram shape when viewed from the direction of the rotational axis of rotation of the first link 132 and the second link 133. .
The other end of the first link 132 and the other end of the second link 133 are connected via a connecting link 138 . The other end of the first link 132 is rotatably connected to the connecting link 138 via the second joint portion 135 . The other end of the second link 133 is rotatably connected to a connecting link 138 via a fourth joint portion 137 .

A transmission mechanism 300 is attached to the second link 133 . When the transmission mechanism 300 moves, the second link 133 turns around the third joint portion 136 . The turning of the second link 133 is transmitted to the first link 132 via the connecting link 138, and the second link 133 and the first link 132 move parallel to each other.

The elastic portion 139 is provided between the second link 133 and the housing 3 . The elastic portion 139 exerts a force that pulls the second link 133 toward the first link 132 side. In addition, the transmission mechanism 300 exerts a force that pulls the second link 133 to the side opposite to the first link 132 .
In a state where the transmission mechanism 300 does not apply the power of the leveling mechanism 200 to the second link 133, the elastic portion 139 applies a force to pull the second link 133 toward the first link 132, and the first link 132 absorbs moisture. The member 110 is positioned at the first position to close the outer opening 10 .

The case 150 is a member that covers the moisture absorbing member 110 . The case is provided with a plurality of holes through which the absorbent member 110 is exposed. The case 150 is a substantially rectangular parallelepiped box that covers the plate-shaped moisture absorbing member 110 . A plurality of holes are provided in each of the surfaces facing each other.

As shown in FIG. 1, the case 150 closes the inner opening 11 when the moisture absorbing member 110 is at the second position, and exposes the moisture absorbing member 110 into the humidity control chamber 9 through the hole. Further, as shown in FIG. 1, when the moisture absorbing member 110 is at the first position, the outer opening 10 is closed and the moisture absorbing member 110 is exposed in the humidity control chamber 9 through the hole. there is

The heater 120 is configured to be energized and heat the moisture absorbing member 110 when the moisture absorbing member 110 is positioned at the second position. A bus bar (electrode) 121 is provided on the partition wall 8 to conduct electricity with the heater 120 so that electricity is supplied when the moisture absorbing member 110 is positioned at the second position.

The holding mechanism 160 has a locking portion 161 and a release portion 162 . The holding mechanism 160 is provided inside the humidity control chamber 9 . The locking portion 161 is a rotatable claw-like member, and can rotate between a holding position that holds the moving mechanism 130 and a releasing position that allows the moving mechanism 130 to move. The locking portion 161 is located at the released position when the moisture absorbent member 110 is at the first position.

When the first link 132 and the second link 133 turn to a position where the key portion 132A provided on the first link 132 can be engaged with the locking portion 161, the later-described release portion 162 operates. When the release portion 162 is actuated, the locking portion 161 rotates to the fixed position and engages with the key portion 132A. Thereby, the locking portion 161 holds the entire moving mechanism 130 at the second position. The locking portion 161 may have another configuration as long as it can hold the moving mechanism 130 . For example, the second link 133 may be provided with a key portion.

The release portion 162 is an elastic member, and is configured to switch the locking portion 161 described above between a holding position and a release position. In this embodiment, the release portion 162 is made of a shape memory alloy. When the release portion 162 is heated, the locking portion 161 is moved to the holding position, and when it is cooled, the locking portion 161 is moved to the release position. The release portion 162 may have other configurations as long as the position of the locking portion 161 can be controlled.

Next, with reference to FIGS. 2 to 6, operation modes of the humidity control mechanism 100 according to this embodiment will be described.
FIG. 2 shows the initial state of the leveling mechanism 200 immediately after the vehicle is powered on. At this time, the moisture absorbent member 110 is positioned at the first position, and the outer opening 10 is closed. That is, in this state, the hygroscopic member 110 can absorb moisture in the lamp chamber 5 .
At this time, the latch mechanism 240 and the transmission mechanism 300 are not engaged. Immediately after activation of the leveling mechanism 200, the actuator 220 moves backward. As a result, the body portion 210 and the latch mechanism 240 provided on the body portion 210 similarly move rearward. Actuator 220 moves rearward to a distance where latch mechanism 240 and transmission mechanism 300 engage, and stops rearward movement when latch mechanism 240 and transmission mechanism 300 engage as shown in FIG.

FIG. 3 shows the state in which the latch mechanism 240 and the transmission mechanism 300 are engaged. At this time, the moisture absorbing member 110 is positioned at the first position, the transmission mechanism 300 is in the transmission state, and the motion of the actuator 220 can be transmitted to the moving mechanism 130 through the transmission mechanism 300 . 3-6, actuator 220 moves forward with latch mechanism 240 and transmission mechanism 300 engaged.

FIG. 4 shows how the actuator 220 moves forward while the latch mechanism 240 and the transmission mechanism 300 are engaged, and the moisture absorbing member 110 moves from the first position to the second position. At this time, the moisture absorbing member 110 is positioned between the first position and the second position, and the transmission mechanism 300 is in the transmission state. Movement of the moving mechanism 130 is performed by a parallel link 131 . The transmission mechanism 300 pulls the second link 133 forward, and the second link 133 swings forward around the third joint portion 136 . Movement of second link 133 is transmitted to first link 132 by connecting link 138 . As a result, the first link 132 turns forward together with the second link 133 . The first link 132 and the second link 133 are fixed by the first joint portion 134 and the third joint portion 136, and the mutual width is kept constant by the connection link 138. As shown in FIG. Therefore, the first joint portion 134, the second joint portion 135, the third joint portion 136, and the fourth joint portion 137 have a parallelogram shape when viewed from the rotation axis direction of the turning of the first link 132 and the second link 133. Rotate while standing.

FIG. 5 shows a state in which the absorbent member 110 has moved from the state shown in FIG. 4 to the second position. At this time, the moisture absorbing member 110 is positioned at the second position, and the transmission mechanism 300 is in the transmission state. When the moisture absorbing member 110 moves to the second position, the electrode provided on the partition wall 8 and the heater 120 come into contact with each other, and the heater 120 contacts with the bus bar (electrode) 121 to heat the moisture absorbing member 110 and release moisture. Also, at this time, the case 150 closes the inner opening 11 . As a result, the moisture released from the moisture absorbing member 110 does not flow into the lamp chamber 5 but flows out from the outer opening 10 to the outside.
Further, when the moisture absorbing member 110 moves to the second position, the releasing portion 162 of the holding mechanism 160 is heated, the locking portion 161 moves to the holding position, engages with the key portion 132A, and the moving mechanism 130 is held. and

FIG. 6 shows a state in which the engagement between the latch mechanism 240 and the transmission mechanism 300 is released. At this time, the moisture absorbing member 110 is positioned at the second position, and the transmission mechanism 300 is in the non-transmitting state. After the moisture absorbing member 110 moves to the second position, the switching mechanism 250 releases the engagement between the latch mechanism 240 and the transmission mechanism 300 to set the non-transmission state.
The release portion 162 is heated for a certain period of time after the moisture absorbent member 110 is positioned at the second position. While the releasing portion 162 is being heated, the engaging portion 161 is positioned at the holding position, and the moving mechanism 130 is placed in the holding state. When the moving mechanism 130 is in the holding state, even if the transmission mechanism 300 is in the non-transmitting state, the moisture absorbing member 110 will not move from the second position.

After a certain period of time has elapsed from the state shown in FIG. 6, the heating of the release portion 162 is completed, and the locking portion 161 moves to the release position. When the locking portion 161 moves to the release position, the engagement between the locking portion 161 and the key portion 132A is released, and the holding state of the moving mechanism 130 is released. When the fixed state of the moving mechanism 130 is released, the first link 132 and the second link 133 move rearward due to the elastic restoring force of the elastic portion 139 connected to the second link 133, and the moisture absorbing member 110 moves to the first position. move to

As described above, according to the vehicle lamp 1 according to the present embodiment, the power for moving the moisture absorbing member 110 from the first position to the second position is obtained by transmitting the power of the leveling mechanism 200 to the moving mechanism 130 through the transmission mechanism 300. supplied with By using the power of the leveling mechanism 200 mounted on the vehicle lamp 1 to realize the leveling function, there is no need to provide a new power source for moving the moisture absorbing member 110, so the humidity control mechanism 100 is mounted. Even if this is the case, it is possible to suppress an increase in the size of the vehicle lamp 1 .

According to the vehicle lamp 1 according to this embodiment, the moving mechanism 130 moves the moisture absorbing member 110 from the first position to the second position by power transmitted by the transmission mechanism 300 . As a result, the moisture absorbing member 110 is divided into a position for absorbing the humidity in the lamp chamber 5 and a position for releasing the absorbed moisture, so that the humidity in the lamp chamber 5 can be adjusted efficiently.

According to the vehicle lamp 1 according to this embodiment, the moving mechanism 130 has the elastic portion 139 that exerts an elastic force on the moisture absorbing member 110 to keep it positioned at the first position. As a result, when the moisture absorbing member 110 is at the first position, even if the vehicle suddenly stops or accelerates, the moisture absorbing member 110 can be kept at the first position. can be adjusted.

According to the vehicle lamp 1 according to the present embodiment, when the moisture absorbing member 110 is positioned at the second position, the moisture absorbing member 110 is fixed at the second position by the holding mechanism 160 even if the transmission mechanism 300 is in the non-transmitting state. be done. Therefore, the moisture absorbing member 110 can be kept at the second position even when the power is not applied to the transmission mechanism 300, and the humidity in the lamp chamber 5 can be controlled with power saving.

According to the vehicle lamp 1 according to the present embodiment, the holding mechanism 160 includes the locking portion 161 that directly or indirectly locks the moisture absorbing member 110 and the locked state of the moisture absorbing member 110 by the locking portion 161. and a holding spring portion. In addition, at least a part (all in this embodiment) of the spring portion made of a shape memory alloy functions as a release portion, and the release portion 162 maintains the locked state by the locking portion 161 at room temperature, and The locked state of the moisture absorbing member 110 by the locking portion is released. As a result, the holding mechanism can lock and release the moisture absorbing member with a simple structure, so that it is possible to suppress an increase in the size of the vehicle lamp.

In the above-described embodiment, the bus bar (electrode) 121 is provided on the partition wall 8 where the inner opening 11 exists so that the heater 120 is energized when the moisture absorbing member 110 is positioned at the second position that closes the inner opening 11 . is provided. Therefore, the heater 120 can be energized without wiring in the humidity control mechanism 100 that moves to the first position and the second position, and the wiring can be easily routed.

The vehicle lamp 1 according to this embodiment has the switching mechanism 250 that switches the transmission mechanism 300 between a transmission state in which power is transmitted from the leveling mechanism 200 to the moving mechanism 130 and a non-transmission state in which power is not transmitted. Thus, when it is desired to adjust the leveling of the vehicle lamp 1 by the leveling mechanism 200, the leveling mechanism 200 can be operated independently of the moving mechanism by cutting off the power transmission to the moving mechanism 130. - 特許庁

According to the vehicle lamp according to the present embodiment, an example has been described in which the power for moving the moisture absorbing member 110 from the second position to the first position is supplied by the elastic restoring force of the elastic portion 139, but the present disclosure is directed to this. Not limited. For example, the configuration may be such that the power for moving the moisture absorbing member 110 from the second position to the first position is supplied from the leveling mechanism 200 through the transmission mechanism 300 .

In the above-described embodiment, the releasing portion 162 is made of a shape memory alloy, and an example in which the locking portion 161 is moved to the fixed position by heating the releasing portion 162 has been described, but the present disclosure is not limited to this. For example, it may be an elastic body having a switching mechanism.

It should be noted that the present disclosure is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the meaning and scope of equivalents to the scope of the claims.

This application is based on Japanese Patent Application No. 2022-023811 filed on February 18, 2022, the contents of which are incorporated herein by reference.

Claims

a light source provided in a lamp chamber formed by an outer lens and a housing;
a leveling mechanism that adjusts the direction of light emitted from the light source;
a partition partitioning a part of the lamp chamber to form a humidity control chamber;
and a humidity control mechanism,
The partition wall is provided with an inner opening that connects the lamp chamber and the humidity control chamber,
The housing is provided with an outer opening that communicates the humidity control chamber with the outside,
The humidity control mechanism is
a moisture absorbing member movably provided in the humidity control chamber;
a movement mechanism for moving the moisture absorbing member between a first position for closing the outer opening and a second position for closing the inner opening;
Having a transmission mechanism that transmits power from the leveling mechanism to the moving mechanism,
Vehicle lighting.
The moving mechanism moves the moisture absorbing member from the first position to the second position by power transmitted by the transmission mechanism.
The vehicle lamp according to claim 1.
The moving mechanism has an elastic portion that applies an elastic force to the moisture absorbing member to keep it positioned at the first position.
The vehicle lamp according to claim 1.
The moving mechanism has a holding mechanism for holding the moisture absorbing member at the second position,
The vehicle lamp according to claim 1.
The holding mechanism has a releasing portion that releases the moisture absorbing member from a holding state in which it is held at the second position and returns it to the first position,
The vehicle lamp according to claim 4.
The holding mechanism is
a locking portion that directly or indirectly locks the moisture absorbing member;
a spring portion that maintains the locked state of the moisture absorbing member by the locking portion;
At least part of the spring portion made of a shape memory alloy functions as the release portion,
The release portion maintains the locked state of the locking portion at room temperature, and releases the locked state of the moisture absorbing member by the locking portion when heated.
The vehicle lamp according to claim 5.
The humidity control mechanism has a heater for heating the moisture absorbing member when energized,
An electrode is fixed to the partition wall for energizing the heater when the moisture absorbing member is at the second position.
The vehicle lamp according to claim 1.
A switching mechanism for switching the transmission mechanism between a transmission state in which power is transmitted from the leveling mechanism to the moving mechanism and a non-transmission state in which power is not transmitted,
The vehicle lamp according to claim 1.
The moving mechanism moves the moisture absorbing member between the first position and the second position by power transmitted by the transmission mechanism.
The vehicle lamp according to claim 1.